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Highly sensitive and selective detect of p ‐arsanilic acid with a new water‐stable europium metal–organic framework
Author(s) -
Wang ChaoYang,
Fu Huifen,
Wang Peng,
Wang ChongChen
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5021
Subject(s) - chemistry , europium , fluorescence , citric acid , alkalinity , metal , nuclear chemistry , linker , environmental chemistry , organic chemistry , ion , physics , quantum mechanics , computer science , operating system
The p ‐arsanilic acid ( p ‐ASA), as an aromatic organoarsenic compounds, had received considerable concerns for their potential toxicity and carcinogenic properties. It was essential to detect p ‐ASA with a facile method. In this paper, an europium based fluorescent metal–organic framework (MOF) [Eu 2 (clhex)·2H 2 O)]·H 2 O ( BUC‐69 ) was successfully prepared under hydrothermal conditions with 1,2,3,4,5,6‐cyclohexanehexacarboxylic acid (H 6 clhex) as organic linker. BUC‐69 displayed superior fluorescence capability to achieve selective and sensitive detection toward p ‐ASA in water, which presented the first example of a MOF‐based sensor to detect p ‐ASA. BUC‐69 showed excellent chemical stability in solutions under pH ranging from 4 to 12, which makes it be a potential sensor both in acidity and alkalinity condition. Significantly, BUC‐69 performed well in fluorescent sensing of p ‐ASA at a low concentration (10 −6 M) in the simulated wastewater prepared with real lake water, and the results were comparable to the values detected by Inductively Coupled Plasma Optical Emission Spectrometer (ICP‐OES). The corresponding mechanism of fluorescent sensing toward p ‐ASA with BUC‐69 was proposed and affirmed.